Advanced RF Power Amplifier Techniques
Course 114
| San Jose, CA | Dec 06-Dec 09, 2010 |
| Course 114-4241 | Presented by Steve Cripps |
Register by 11/1/2010 and pay $1995, otherwise pay $2195  | |
Summary:
In any system, the power amplifier (PA) is a critical component. It is typically the most costly single item and consumes most of the supply power. Knowledge of the possibilities for trading power per unit cost with efficiency and linearity often forms the basis for the entire system architecture design.
The increasing use of linearisation techniques, and especially the emergence of high speed digital processing as an enabling technology to implement predistortion on the PA input signal, represent an important paradigm shift in PA design. The PA component can now be designed with more emphasis on efficiency, without the traditional constraints of meeting stringent linearity specs simultaneously. Maximising the utility of a lineariser in order to obtain optimum efficiency has thus become a new subject area in modern RF PA design.
This is a newly revised and updated 4-day RF PA design course, dealing with the theory and design of RF power amplifiers for wireless, satcom, and microwave applications. The course features in-depth treatment of PA design, PA modes, envelope power management, and non-linear effects.
Learning Objectives:
Upon completing the course, the participant will be able to:• understand power amplifier basic concepts, classes of operation, stability, linearity, bias techniques
• develop impedance matching networks based on lumped elements and transmission lines
• utilize high-efficiency techniques including well-known Classes F and E and newly developed classes, efficiency enhancement techniques
• understand power amplifier non-linearities and signal environments
• describe PA architecture
Target Audience:
This course presents an overview, fundamentals, theory, practical and advanced power amplifier design which will be of interest to engineers and technical staff, managers and business development personnel who plan to pursue this technology, or compete with it.Outline:
Day One
Power Amplifier Basics and Signal Environments• Introduction • Classical PA Modes, Class A, Class AB, Class B, Class C : quantitative analysis of power, efficiency and linearity tradeoffs in uncompensated form • PA Device Technology : LDMOS, GaAs MESFET and HBT, SiC and GaN • Optimum Device Characteristics for Class AB Operation : impact of non-ideal harmonic terminations • Modulation Systems in Wireless Communications QPSK, GSM, EDGE, OFDM • Effect of Signal Environment on RFPA Design
Day Two
Class AB PA Design• Practical design and manufacturing issues • Class AB circuits • Harmonic Terminations • CAD Design Examples : GaAs MESFET, GaAs HBT, high power LDMOS • The Doherty PA
Day Three
Power Amplifier Non-Linearity and Signal Environments• Non-Linear PA Characteristics, Gain Compression, AM-PM • Physical Origins of AM-PM, Analysis : converting measured PA gain compression and AM-PM characteristic into spectral and EVM distortion, and the issues involved • Peak to Average Power Ratio Issues in Modern Signal Environments • Spectral Regrowth and EVM • Power Series, Volterra Series. Model Fitting using measured Data • Envelope simulation using EDGE, OFDM signals • Memory Effects, definition, dynamic gain/phase measurements, causes and remedies • Bias Network Design and Stability
Day Four
Efficiency Enhancement Techniques• Ultra High Efficiency Modes (Class D,E) • LINC Techniques; Khan, Chireix, and Polar : other techniques for broad band requirements, such as WiMAX • Power Combining Techniques; Balanced and Push-Pull Operation • Load-Pull Techniques • Microwave PA Design : higher GHz frequencies, broader bandwidth applications
Subject Areas Covered
RF Power Amplifier DesignMilitary, Aerospace, Satellite Technology
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